Piston packing-ring



L W. BROKS.

PISTON PACKING RING.

APPLICATION man MAY8.1918.

1,357,949. 4@mesa Ew. 9,1920.

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THOMAS WM. BROOKS, DF'CLEVELANI), OHIO.

PSTON" PACKING-RING.

instaan Specification of Letters Patent.

pplica'ticn. iled May 1918. Serial No. 233,186.-

TQ all whom t may concern:

.Be it known that l, THOMAS W'. Biiooiis, a citizen of the United States, residingl at Cleveland, in the 'county of Cuyahoga and I State ofl Ohio, have invented certain new and useful Improvements in Piston Packing-Rings, of which the following is. a specification.

This invention relates to packing rings for the pistons of steam, gas, gasolene, kerosene and other internal combustion eno'ines uniform degree of pressure in all directions' against the cylinder walls so that there will be no likelihood ot the cylinder being Worn unevenly as is likely to' occur in the use of the ordinary diagonally split packingi'ing's the pressure of which against the Wallis of the engine or pump cylinder varies throuo'he out the circumference of the ring. In vt is connection the invention aims further to provide `a piston packing ring formed in struction that the saine may sections, the inner peripheries of the rings being eccentric to the 4outer pcripheries and the rings being adapted to be assembled and held in such relative position at all times that the pressure oi? lthe rings against the cylinderwalls will be cqualized through the entire circumference of the Wall.

A further object of the invention is to provide a form of joint between the ring sections which will positively preclude any scoring of' the cylinder, the exterior suri'ace of the composite ring being entirely smooth throughout the circumference thereof so that an unbrol'ren surface is presente ed to the cylinder Walls and there is an absence of 4any sharp corners or edges as in the case oiilthe ordinary split ring.

A further object ofthe invention is to provide a piston packing rino' of such contbe readily aplied to any ordinary piston to which the orcinary packing ring is applicable, the 'ring of thepresent invention being designed 'to seat Within'the grooves ordinarily found in the conventional types of pistons and Without any alteration in the forni ci the Walls of the said grooves.

Another object of the invention is to provide upon the sections of each ring, means constituting an abutment for. the ends of the other ring section Whenv the sections are assembled, the said abutment means serving eil'ectually to prevent-'the ends of eithei' section coming in direct contact with the cylinder Walls which would belikely to cause scoring of. the said Walls.

In the accompanying drawings:-

Figure l is a v vertical sectional View through the upper ortion of a piston and the cylinder in which the same is to reciprocate, the said, view illustrating di'ainetrical sections of the packing ring embodying the present invention," and the rings illustrated in the said figure being variously positionedl so as 'to illustrate the cross-sectionalcontour oi toe ring sections* at different points in the circumference thereof Patented Nov'. 9, ieee.`

Fig. Q is a horizontal sectional View on,

the line 2-2 of Fig. 1;

Fig. 3 is a group lpers lactive view illus.

trating thetwo sections o ther-ing embodying the present invention, separated "from each other. 1

l In the drawings, the'nuuieral 1 indicates anengine or pump pylinder and 2 the piston Which'is to reciprocate therein, the said piston being formed vas usual with one or incre circumferentially 4extending grooves in Which the packing ring or rings may be fitted, therings' being designed, of course, to expand against the inner surface ofthe cylinder Wall Thepiston ring embodying the present invention is made up of-'tivo counterpart sections each indicated in general by the reference numeralV 4:.y Each section 4 has substantially the :form of an open anniilus, the outer periphery of each section, indi cated Vby the numeral .`5, and the inner periphery ofeach section, indicated by the numeral 6, being eccentric to each other.

Due to the eccentric relation of' thel inner and outer peripheries of nach ring section, each ring section vwill taper froml a point midway between its endsfto its said ends, the taper bein gradual as shown clearly in Fig. 2 of the rawings but dependin' upon the diameter of the ring` as s.y whofa. Of

eee

course, due to the taper of the ring' in the direction of its ends, the ring will be more v.resilient at points approaching its ends than a Whole will bearwith an even degree of pressure at all points in its circumference against Vthe innerl surface of the cylinder Formed upon one face. of each-'Ling SGC- tion i at the intermediate portion thereof, is a rib 7 of a height equal-to the thick4T ness of `either ring section and having' an outer arcuate face 8 forming anextension oi' the cylindrical surfacefdescribed .by the outer periphery 5'of the vrespective ring section. The oppositeface'of each rib, indicated by numerals), ischordal to the arc 'described by the outer Aperiphery of the respective ring section, `andbetween the inner tace 9 of each rib and theinner circumference yof the adjacent section is asupporting ledge or shoulder for tliei'ends of the adjacent or mating section, as Willfbcrevident by reference to' Figs. 2 and 3 of.thcddravvings. Also jby reference to the Said iguetsi fi. ii

it will be Vobserved that the ends of each ring section are spaced apart a distance somewhat less than the length of the face 9 of the rib 7,` and that the said ends are beveled or cut at an angle to provide an inclined or beveled face 10, which face' of each endl is preferably smoothly finished. Thev ring sections 4: are of uniform thickness throughout except at the point of .location Y.

o rthe respective ribs`7. In assembling the ring sections, the saine are placed "together 'insuch manner that' theend faces 10 of f 'eachsectionmill abut andrest substantially tiatagainst the chordal face 9 of the rib oi2 the other section.,` Initially, 'of course, the ring sections are outwardlyfsprung or expanded due to their` inlrierentA resiliency,

11i Willljregister exactly with thejen'd' edges of thel chordal-ace 8iofiftlieiribiffcgeinst f Y' 'stantially -atagainst the chordal il* course, when the piston-istted into'V which the end faces l0 bear.v Due to thisv fact and the :tact that the faces l@ bear slib-Y 9 oit the ribs 'T and the outer of arcuate laces 8 of the ribs form coninuations of the tylinn drical surfaces described by the cuter peripheries of the ring sections, there Will. be no break whatsoe er at any point in the circunifen,..c.ce of the ring as a Whole when the sections are properly assembled and a true cylinder surface Will be presented to the inner surface of the cylinder Wall l. As a consequence there can be no leakage of liuid past the piston, and there are no sharp edges or corners presented to the cylinder Walls liable'to scratch or score the saine or liable to vvear the cylinder out of true.

,Having thus described the invention, what is claimed as new is:

. l. A piston packing' ring coinprisin f superposed sections of like formation, eaci section having substentially the :form of an open annulus and each section being; tapered from its intermediate portion in the direc tion of its ends, and a rib upon one face'oi each section having its inner face iiat and chordal to the arc described by the section and spaced inwardly from the inner circum-l ferential edge of said section to forme supporting ledge for the ends of the other section `and constituting an abutment for said ends when the sections are assembled, the ends of said sections having flat beveled facesresting against the cliordal faces ci the ribs.

2, piston packing ring comprising Superposed resilient sections of like torinau tion, each section having substantially' the form ofen open annulus and each section being .provided intermediate its ends with a rib spaced inwardly from the innerfciru cumferential edge or said section to forni a supportingledgc 'for the ends of an adjacent section, the sections being designed to be l L lessemhled with their intermediate portici-.is

diametrically oppcsitely located and with the ribs of one section ovierlapping theopen portion of an vadjacent section and hearing against the ends thereof, each section having its inner Aperiphery continuously"eccentric `to its outer periphery.

l, testimony whereof l signa ture..

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